/*
THIS CODE HAS BEEN TESTED AND IS FULLY OPERATIONAL.

Problem Statement: Write a C++ program that creates an output file, writes information to it, closes the file and open it again as an input file and read the information from the file.

Code from Object Oriented Programming (SPPU - Second Year - Computer Engineering - Content) repository on KSKA Git: https://git.kska.io/sppu-se-comp-content/ObjectOrientedProgramming
*/

// BEGINNING OF CODE
#include<iostream>
#include<fstream>
using namespace std;

class Employee {
	string name;
	int identity;
 	double salary;

	public:
	void accept() {
		cout<<endl<<"Enter name:\t";
		cin.ignore();
		getline(cin,name);
		cout<<"Enter ID:\t";
		cin>>identity;
		cout<<"Enter salary (in Rs.):\t";
		cin>>salary;
	}

	void display() {
		cout<<endl<<"Name is:\t"<<name<<endl;
		cout<<"ID is:\t"<<identity<<endl;
		cout<<"Salary is (in Rs.):\t"<<salary<<endl;
	}
};

void openFun() {
	Employee o[5];
	fstream f;
	int i,n;

	cout<<endl<<"FILE OPERATION USING open() FUNCTION."<<endl;

	f.open("info.txt",ios::out);
	cout<<endl<<"Enter total employees:\t";
	cin>>n;
	for(i=0;i<n;i++) {
		cout<<endl<<"Enter information of employee no. "<<i+1<<endl;
		o[i].accept();
		f.write((char*)&o[i],sizeof o[i]);
	}

	f.close();

	f.open("info.txt",ios::in);
	cout<<endl<<"Information stored in:\n";
	for(i=0;i<n;i++) {
		cout<<endl<<"Information of employee "<<i+1<<" is:\n";
		f.write((char*)&o[i],sizeof o[i]);
		o[i].display();
	}
	f.close();
}

void constFun() {
	Employee o[5];
	fstream f;
	int i,n;

	cout<<endl<<"FILE OPERATION USING CONSTRUCTOR FUNCTION."<<endl;

	ofstream outf("info.txt");
	cout<<endl<<"Enter total employees:\t";
	cin>>n;
	for(i=0;i<n;i++) {
		cout<<endl<<"Enter information of employee no. "<<i+1<<endl;
		o[i].accept();
		outf.write((char*)&o, sizeof o[i]);
	}

	ifstream inf("info.txt");
	cout<<endl<<"Information stored is:\n";
	for(i=0;i<n;i++) {
		cout<<endl<<"Information of employee "<<i+1<<" is:\n";
		o[i].display();
	}
	inf.close();
}

int main() {
	openFun();
	constFun();
 cout<<"\n## END OF FILE";
 return 0;
}
// END OF CODE